.main {
  max-width: 1280px;
  min-width: 1000px;
  min-height: 700px;
  width: 100%;
  height: 100%;
  margin: 0 auto;
  padding-top: 50px;
  padding-bottom: 50px;
  background-image: url("../img/bg.jpg");
  background-repeat: no-repeat;
  background-size: cover; }
  .main .workspace {
    width: 50%;
    height: 100%;
    margin: 0 auto;
    padding: 50px;
    padding-top: 10px;
    background-color: rgba(255, 255, 255, 0.2);
    position: relative; }
    .main .workspace .container {
      width: 100%; }
      .main .workspace .container .title {
        height: 70px;
        width: 100%;
        background-color: rgba(0, 0, 0, 0.2);
        margin-bottom: 10px;
        border-radius: 10px; }
        .main .workspace .container .title p {
          line-height: 70px;
          font-size: 30px;
          color: #dddddd;
          text-indent: 1em;
          -webkit-user-select: none;
          -moz-user-select: none;
          -ms-user-select: none;
          user-select: none; }
      .main .workspace .container .row .col-xs-3 {
        height: 85px;
        position: relative;
        overflow: hidden;
        cursor: pointer; }
        .main .workspace .container .row .col-xs-3 .card_box {
          width: 70px;
          height: 70px;
          overflow: hidden;
          border-radius: 10px;
          margin-bottom: 15px;
          -webkit-transform: rotateY(90deg);
          transform: rotateY(90deg);
          position: absolute;
          top: 0px;
          left: 0px; }
          .main .workspace .container .row .col-xs-3 .card_box img {
            width: 100%;
            height: 100%; }
        .main .workspace .container .row .col-xs-3 .card_back {
          width: 70px;
          height: 70px;
          border-radius: 10px;
          background-color: rgba(0, 0, 0, 0.2);
          position: absolute;
          -webkit-transform: rotateY(0deg);
          transform: rotateY(0deg);
          top: 0px;
          left: 0px; }
    .main .workspace .button_area {
      position: absolute;
      top: 20%;
      left: -150px;
      background-color: transparent;
      min-height: 60px; }
      .main .workspace .button_area .btn_box {
        padding: 5px 30px;
        font-size: 25px;
        color: white;
        background-color: rgba(255, 255, 255, 0.2);
        border-radius: 10px;
        margin-top: 15px;
        cursor: pointer;
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none; }
        .main .workspace .button_area .btn_box:hover {
          background-color: rgba(255, 255, 255, 0.1); }
    .main .workspace .notice {
      display: none;
      position: absolute;
      padding: 15px 80px;
      top: 200px;
      right: 10%;
      width: 80%;
      background-color: rgba(0, 0, 0, 0.2);
      text-align: center;
      color: white;
      font-size: 16px; }
      .main .workspace .notice .btn_box {
        display: inline-block;
        vertical-align: top;
        padding: 5px 30px;
        font-size: 16px;
        color: white;
        background-color: rgba(255, 255, 255, 0.2);
        border-radius: 10px;
        margin-top: 15px;
        cursor: pointer;
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none; }
        .main .workspace .notice .btn_box:hover {
          background-color: rgba(255, 255, 255, 0.1); }
